Question 1: In the video clip, the teacher states that she is going to teach subtraction. Why do you think that she reviews strategies for addition before beginning the subtraction lesson? The students learned several addition strategies. How will those strategies help the students learn subtraction?

I think she began by reviewing addition in order to ensure that students are recalling the skills they learned when adding. It is important that students can retain the information from previous skills in order to move on to harder ones. In order to learn subtraction, students need to understand how to add numbers well. She then proceeded on recalling the various strategies students learned while adding. I feel she did this because these strategies will be used when learning how to subtract numbers as well.